This is one of the cases that I will have to answer by giving my impressions that were gained from looking at photographs.
In the Soviet Far East they still had some BA-3/6/10, mainly BA-10, possibly FAI/BA-20 in small numbers. Like many of the older tanks (KV-1, BT-7) that saw service in August Storm, many were already there pre-war and some would have been 'retired' there during the war.
So apart for the SFE, the main recon vehicles (in Europe) were the BA-64 and US M3A1 Scout car. Small numbers of T-70 and T-80 light tanks would have been passed on when tank units (brigades, regiments and separate battalions) went from a mix of light and medium to all medium. US T-48 aka SU-57 were sometimes included for fire support. Jeeps, Peeps, Gaz-64/67 (Soviet Jeep equivalent), motorcycles, sidecars and of course the long suffering horse were the main movers.
In summary, pure armoured cars only, BA-64 everywhere, BA-3/6/10 and FAI/BA-20 Soviet Far East only.
As I said, just my impressions, I'm sure there was the odd relic where it shouldn't be.